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After major system outages Tuesday CVS Health pharmacies reported there was an internal network problem, CNBC reported.

The cause is unknown according to the CVS spokesperson.

CVS non-executive Chairman David Dorman told CNBC Wednesday that top management notified him about the network issue after customers complained about not being able to refill their medications.

Customers took to social media to speak out about their complaints and express their dissatisfaction.

Parkland Shooting Survivor Calls 'BS' on Politicians' Gun Stance

Marjory Stoneman Douglas High senior Emma Gonzalez had a message for president Donald Trump and for other politicians on their failure to enact sensible gun laws: "BS." Gonzalez was one of several survivors to speak at a rally held outside the Federal Courthouse in Fort Lauderdale, Florida, to speak out against the gun lobby.